/Engine/Source/Editor/ViewportInteraction/Public/ViewportWorldInteraction.h
Returns the list of actors that should never be included in interctor hit tests (hovering or selection)
const [TArray](API\Runtime\Core\Containers\TArray)< [TWeakObjectPtr](API\Runtime\Core\UObject\TWeakObjectPtr)< [AActor](API\Runtime\Engine\GameFramework\AActor) > > & GetActorsToExcludeFromHitTest() const